Hella RTK3 SL Police flashing light

Hella RTK3 SL Police flashing light in very good condition. The system worked perfectly until it was removed. I tested the blue rotating lamp with 12V and it is running very well. The base is stamped with "Hella RTK 3 - SL, 12V, Made in Germany". The blue lens has the original white print on the lower edge of the hood and the top is stamped with "Hella Made in Germany". On the beacon motor is a sticker marked with “FMBW DT 07/1991” and so possible made 1991. The paint is the first and the green is original police green. With intact connector for radio connection / microphone, with a good roof seal and with a copy of the instructions / wiring diagram. Hard to get a better Hella RTK 3 S/L. 8500 g heavy.